Snail, alongside what I presume to be its poop.
Land snail. These were rather common and easy to see. May be the same or similar species as https://www.inaturalist.org/observations/1929539 .
Introduced Pest: Giant African Snail, Achatina fulica
These were spotted plenty in a few places in between Malinagar to Malshiras.
A large Giant African Land Snail 非洲大蝸牛 (Achatina fulica), shell is over 4" in length + body of about 3" in length.